Underreamer for reaming out producing-sands



v A. L. LAMBETH. Y UNDERREAMER FOR REAMING OUT PRODUCING SANDS.

' APPLICATION HLED NOV- 22v 1918.

Patented Sept. 21, 1920.

" hour 1.."LAMBETH,or immnwma mxas, ASSIGliTOR, evbmnornnn MES'NE "ASSIGNME TS; or ONE-HALF "ro-"ouLLEN B. COOPER AND ONE-HALF To. ALBERT L.

v HOUSTON, BOTH OF DALLAS, TEXAS.

UNDERREAMER FOR READ/H ve OUT rnonuomdsmqnst it To all wlmmz't mag/concern:-

Be it known that I, AoEY LLLAMBETH, a citizen of the United States ofAmerica, residing at vMineral Wells, in the county. of

Palo Pinto and State of Texas, have in" vented certain new and useful Improvements in Underreamers "for Beaming Out Producing-Sands, of which the following is aspecification. f

My invention relates to well drilling tools and more particularly jtounderreamers for reaming out producing sand from the cap-roclrto the bottom of the well; andthe ob'jeetis to provide undefleaming tools or bits which, can bead usted from the top of the well and which can beset at there-- quired angle and which will be held-rigidly in the required position relative to the'work to be done and which is provided with a guiding member forcausing uniformity in wtho underreaming... Other objects and ad-v vantageswill befully explained in the following description and the inventionwill be more particularly pointed out in the claims.

Reference ishad to-the accompanying form apart of thisappli v drawings which cat-ion, H i s Figure 1 is an, elevation of. the under.- rea'mer, partly-in section with the reamer removed for-clearness in illustration. Fig.

. i2 is an elevation of the tool with the reamer turned out of its place to show certain parts ofthe guard member. Fig. 8 1san-1nter1or elevation of the reamer. Fig. 4 is a broken side elevation of the carrier and guard member. Fig. 5 1s a planxviewof the looking ratchet.

Similar characters of reference are used, parts throughout the to indicate the same several views.

The improved tool has body member 1 which constitutes a carrier for the reamer 2. The carrier is screwed into a hollow drill rod 3 to be operated by the rod'3. The carrier is cut away to form a recess for the 'reamer, as shown byFig-d. The reamer 2 I is pivotally mounted on the carrier by a pivot bolt 4. The carrier 1 is' extended at the lower end to form a guide 5 which may also be used as a drilling member. A bush-- ing 6 is used to take theweight or'wear off the bolt 4. The carrier 1 has a groove 6 in the inner face thereof and the reamer 2 has a projecting lug 7 which moves in the 1 Specification of Letters'Patent. fp eeilte 's t. 21, 1920.; Application filed November 22, 1918. Serial m; 263.669. J

groovefi for limiting the movement. of the reamer relative to the carrier. The reamer I 2 isjswungto one side of. the carrier 1 and the lug Twill reach the end- Sand be stopped I at that point. 1 Means are provided the reamer92 at'any angle required. The reamer has bevel gear teeth ,9. The. teeth "9. form a r ackl A rodlOextends from the surface of the ground down through the drill rod 3. The rod 10 may be a hollow cylindrical rod provided with a solid CEllll'.

for setting and fixing drical member ll which is attaehedto the rod 3 by a coupling12." The rod member 11 has a bevelgear wheel 13 formed on-thei lower end which meshes with the teeth 9 of the segmental gear. The member '11 is 111 serted in the-upper end of the member 1 and'l is held therein by coll-arid which is rigidly attached thereto. A turning of the rod 10 will turn the bevel gear wheel 13 and tion of reaming out the sands. The ream'er canbe brought baclrtovertl'cal position or in line wlth the memberfl-by' releasing/the turning the-rod 10.

'- pawl 16 from'the ratchet wheel 15 and then In operation,-the member 1 will guide the reamer down in the opening alreadymade and cause the reamer to cut uniformly as it goes down. proportions, and construction and arrangement may be made without departing from my invention. The guide member 1 has a bearing shoulder 18 which will relieve strain onthe pivot bolt it and the upper end 19 of the member 2 is curved to conform to the contour of the bearing 18. The curva ture of the parts 18 and] 19 is suflicient to relieve thestrain on the bolt 4 in whatever position the member 2 may be positioned in operation. The part 1 has provision to furnish water in between the meeting faces of the members 1 and 2 so that mud will not be caked between these members and obstruct their free operation. An opening 20 Various changes in the" sizes,

is made through a portion of the body of the part 1 and then a groove 21 in'the inner face of tlie member 1 permits the water to flow down between the meeting faces of the members 1 and 2 What I-claim, is' 1. An extension drill bit having a guide member rigid with a drill rod. and an un derreaming member pivotally mounted on said guide member, means for making said underreaming member rigid wlth said guide member after the underreaming member has i been set at the required angle, and means for projecting water between the meeting faces.

2.- An extensionidrillbit a guide member rigid with a drill rod and provided with a cylindrical head and a semi-cylina drical body having a cavity therein adja- I reaming member pivotally mounted on said;

cent to said head forming a bearing, an ad-V justing rod projecting down through said head and a bevel gear rigid therewith, and projecting .in said cavity, and an underrod of an extension drill comprising a guide member havlng a perforated head screwed 7 rod, a guide member rigid therewith and' bevel into said rod and having a flat body and av cavity in said body adjacent to said head forming a curved bearing, an adjusting rod projectlng down through said head and a car wheel integral therewith and projectlng in said'cavity, an underreaming member having-a curved upper end engag- 'ing Said curVedbearing and having a fiat body pivotally mounted onsaid guide mem- 7 her and having gear teeth on the upper end thereof meshing with said bevel gear anc means for adjusting said underreaming .member relative to sald'guide member.

'4. An extension drill comprising a drill having a flat body anda bearing head provided with a curved cavity therein and an underreaming member pivotally mounted on sald guide member and adapted to engage I said bearing head in said cavity and pro- 7 vided with means for adjusting thevunderreaming member relative to said g'uidem'em "her.

5. An extension dri'll comprising 'a drill rod, a guide member rigid therewith and having a cylindrical head andfa concave bearing in one side thereof, an underreaming'member adapted to bear againstsaid bearing in said cavity and pivotallymounted on said guide member, and means projectingidown through-said-drill rod for adjusting-said underreaming member and holding the same rlgid.

6. An extensiondrill comprising a hollow 'drill rod, a guide member having a head screwedinto the lower end of said rod and a flat face below said head and a cavity therein adjacent to said head andra bearing above 'said cavity, a shaft projected down through said drill rod. and through said head and a bevel gear integral with the lower end of said shaft in said cavity, an underreaming member engaging said bearing in said cavity and having a flat face meeting the flat face of said guide member and having teeth meshing with said bevel gear, means pivotally mounting said underreaming member on saidguide member, and means projecting down through said rod for holding said underreaming' member .at fixed adjustments relative to said guide'member. a

7 An extension drillcomprising a hollow 'fdrill rod, a guide member having a perforated head screwed into the lower end of said rod andhavinga fiat face, an underrea'ming'member pivotally mounted on said guide memberand having a flatface meeting the fiat face of said guide member, said guide member having provision for admission of water between said flat faces, and means projecting down through said rod and said head for adjusting said underreaming member and holding the same at fixed adjustments, 7

In. testimolnly whereof, I set my hand, this 'ovember, 1918.

19th day of AOEY L, LAMBEra}- J 

